Wang, Yangyang published the artcileLigand-Enabled C-H Olefination and Lactonization of Benzoic Acids and Phenylacetic Acids via Palladium Catalyst, Quality Control of 118-90-1, the publication is Organic Letters (2022), 24(3), 821-825, database is CAplus and MEDLINE.
A novel ligand propan-2-one O-(p-tolylcarbamoyl) oxime had been developed to promote C(sp2)-H olefination of benzoic acids and phenylacetic acids via a palladium catalyst. With the subsequent lactonization of the olefinated products through 1,4-addition, a highly monoselective cyclic lactone products of benzopyrones I [R1 = 5-Me, 7-Cl, 5-F, etc.; R2 = CO2Me, CO2Et, CO2Bu, CO2Bn, C(O)NHCH(CH3)2, P(O)(OEt)2] and benzofuranones II [R3 = 5-Me, 6-MeO, 6-CF3, etc.; R2 = CO2Me, CO2Et, CO2Bu, etc.] were obtained in moderate to excellent yields. The DFT calculation demonstrated that the novel ligand propan-2-one O-(p-tolylcarbamoyl) oxime could lubricate the C-H activation reaction to give cyclic lactone products elegantly.
Organic Letters published new progress about 118-90-1. 118-90-1 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Natural product, name is 2-Methylbenzoic acid, and the molecular formula is C25H47NO8, Quality Control of 118-90-1.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia